Brief Advice on Preparing for a Blistering Erg Piece

Let's work backward in time--

Race Day
Well rested, well paced, building in strength and speed towards the end of the piece as you sense the finish line. Your best 2000m piece.

Last Week
Less and less work. Becoming increasingly impatient and restless, almost ready to explode by race day. One week to go, do one time trial at 2000m. Really plan for it, realizing it is unlikely you will achieve any extra speed in the last week. Sleep well, eat healthy foods.

Last Month
More short, intense work, often faster than race pace, decreasing rest between pieces as the month progresses (very important). Total meters should add up to 5000-6000. Occasional long, steady work to break things up.

Before Last Month 
Longer work of 30 minute to 60 minutes, or more if you can handle it, at 5-15 seconds slower than your race pace, depending on your fitness. See how often you can row 13-15K, occasionally 20K. Also, experiment now and then with shorter, more intense pieces to help discover your real potential.